Fridges are used preserve food and drink so that is has a longer life span or is kept cold for a better taste or flavour. They consist of a thermally insulted comparted combined with a heat pump (chemical, mechanical and electronic) which transfers heat from the fridge’s inside to the external environment. This ensures that the inside of the fridge stays cooler than the ambient room temperature – usually at an optimum temperature of 3-5 °C. Types of fridges includes catering fridges, cold rooms, beer fridges, drink fridges, open fridges and open fridge multidecks. Fridges are used in any domestic commercial kitchen but also commonly used in supermarkets and cinemas.